the scientist whom/of whom we've often heard will come

问题描述:

the scientist whom/of whom we've often heard will come
什么时候用of+whom

这里要用of whom,这个就看后面的谓语,hear,hear of sb.表示知道某人,但是对他没有详细的了解.
这里hear是不及物动词,所以要用of whom
什么时候用么,看后面的词,要是是不及物动词,接宾语的话,肯定要加介词.
希望能帮到你,O(∩_∩)O~